My experience has been that you could have two cuttings from the same tree and the growth rate between one and the other would vary dramatically.
Some cuttings might take off nicely from the start then slow down afterward, while others might do the opposite.
Among other factors, the medium used i.e the soil etc.. has a lot to do with it. When I tried rooting my three cuttings of Col de dame Blanc, one of them barely grew while the other two were super fast growers.After I moved one to in ground, growth slowed down but if I recall correctly, it still yielded over 30 figs in its second leaf, while the one left in pot yielded 6 or 7. So there were super fast growth the first year then for some reason, they both slowed down in the second.
I got rid of the third CDD B. I believe that being root bound along with root overheating during the summer months, lack of nutrients and a poor watering plan are the primary suspects that contribute to slow growth in pot. Let's not forget that not all fig varieties are suitable for container gardening.
This year I took my other CDD B and put it in ground at another location hoping that it will perform better. I just have to make sure that it gets the water it needs.